Update MIDI package summary

Bug: 28625060
Change-Id: If552ca8e1a0666d402b5f536699bf3fb09c1e324
(cherry picked from commit 9a279ef267f194dd3f0b777da5a219b6ef04abac)
diff --git a/media/java/android/media/midi/package.html b/media/java/android/media/midi/package.html
index 93dbf3f..8c1010d 100644
--- a/media/java/android/media/midi/package.html
+++ b/media/java/android/media/midi/package.html
@@ -1,12 +1,13 @@
 <html>
 <body>
-<p>Android MIDI User Guide</p>
+
+<p>
+Provides classes for sending and receiving messages using the standard MIDI
+event protocol over USB, Bluetooth LE, and virtual (inter-app) transports.
+</p>
 
 <h1 id=overview>Overview</h1>
 
-
-<p>This document describes how to use the Android MIDI API in Java.</p>
-
 <p>The Android MIDI package allows users to:</p>
 
 <ul>